What a Mid-level } should know

0 core skills, 58 in total. Expectations per skill, and what changes at the next level.

This page lists what a Mid-level } is expected to know and do, skill by skill. Core skills are the ones a manager and peers assess in a review cycle; the rest count only in self-assessment. Main areas: .

0core skills

58additional skills

0skill areas

0%at Advanced or Expert

Assess myself as Mid-level Full role matrix

Core skills for a Mid-level

Grouped by area. The label on the right is the expected depth: Awareness, Working, Advanced or Expert.

Additional skills

Not assessed by the team, but part of the self-assessment and the development plan.

5G Core Network Algorithms & Complexity Apache Kafka API Documentation Async Programming AWS BGP / OSPF Routing ChatGPT / Claude Code Quality & Refactoring Code Review Cursor IDE Data Structures Database Indexing Design Patterns DNS Deep Dive Docker E2E Testing Git Advanced GitHub Actions / GitLab CI GitHub Copilot GraphQL Design gRPC & Protocol Buffers HTTP/2 & HTTP/3 QUIC Integration Testing JWT / OAuth2 / OIDC Kubernetes Core Latency Optimization Load Balancer Deep Dive L4/L7 Load Testing Multithreading Network Automation: Netmiko, NAPALM Network Fundamentals Network Security OOP & SOLID Principles OpenTelemetry OWASP & Application Security PostgreSQL Prometheus & Grafana Prompt Engineering for Code Query Optimization Redis REST API Design Reverse Proxy: NGINX, Traefik, Caddy Secure Coding Practices Signaling Protocols SLI / SLO / SLA Software-Defined Networking (SDN)Structured Logging System Design Fundamentals TCP/IP Deep Dive Telecom Billing Systems Terraform Throughput Optimization Type Safety & Type Systems Unit Testing VoIP / SIP Protocol WebRTC WebSocket API Design

What changes at Senior

58 skills get a higher expectation or become core when moving from Mid-level to Senior. The biggest jumps first.

5G Core Network: Working → Advanced · becomes core
Algorithms & Complexity: Working → Advanced · becomes core
Apache Kafka: Working → Advanced · becomes core
Async Programming: Working → Advanced · becomes core
BGP / OSPF Routing: Working → Advanced · becomes core
ChatGPT / Claude: Working → Advanced · becomes core
Code Quality & Refactoring: Working → Advanced · becomes core
Code Review: Working → Advanced · becomes core
Data Structures: Working → Advanced · becomes core
Design Patterns: Working → Advanced · becomes core

See the Senior page →

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} in the open competency matrix: 58 skills across 5 levels. The matrix is free for individuals and stays free.